App( {
    getUserInfo: function( cb ) {
        var that = this
        if( this.globalData.userInfo ) {
            typeof cb == "function" && cb( this.globalData.userInfo )
        } else {
            //调用登录接口
            wx.login( {
                success: function() {
                    wx.getUserInfo( {
                        success: function( res ) {
                            that.globalData.userInfo = res.userInfo
                            typeof cb == "function" && cb( that.globalData.userInfo )
                        }
                    })
                }
            })
        }
    },

    globalData: {
        userInfo: null,
    },
})